Air compressor



FIG. 1 is a top-front perspective view of an air compressor showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a bottom-rear perspective view thereof.

The dashed broken lines in the figures illustrate portions of the air compressor that form no part of the claimed design. 

CLAIM The ornamental design for an air compressor, as shown and described. 